Plot hole: When the truck and caravan are parked over the manhole cover, in the close-up shot of the manhole, Tristan can be heard saying "Nice work, Rebecca," but Tristan is not with them at this point. He is with Tea, trying to escape with the possessed cops. The only people present in this scene are Joey, Rebecca, Professor Hawkins, and Devlin. (00:14:23)
Continuity mistake: When Yugi and Kaiba's monsters have been destroyed, the two of them turn around to face the demons. They are side by side when this happens, but when the shot cuts, Yugi is suddenly in front of Kaiba. (00:14:06)
Continuity mistake: A creature jumps in between Yugi and Kaiba and then goes through a wall. A giant hole is left in the wall that is circular shaped, but when the shot cuts to an angle inside the wall, the hole is more of an oval shape. (00:11:53)
Continuity mistake: When the main characters meet up with Hawkins, Rebecca, and Devlin, in the shot of Yugi saying "Professor, I'm glad you're all right," Joey is standing directly behind Yugi. In the next shot, Joey is standing on Yugi's left. (00:09:49)
Revealing mistake: When Kaiba opens up his laptop, a close-up of the keyboard is shown. In the shot, the K on the "Caps Lock" key can be seen going over the edge of the key. (00:03:12)
Revealing mistake: When Kaiba's men are typing at the computer while the thugs are attacking, there is a shot of a man typing at a keyboard. In the shot, the "I" key is missing the horizontal line at the top of the letter. The horizontal line at the bottom of the letter is shown, making it look like an upside down T. (00:02:56)
